Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Comprehensive Loss (Parenthetical)

v3.20.4
Consolidated Statements of Comprehensive Loss (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]    
Tax expense (benefits) on marketable securities $ 2 $ 6